Compare pi-bond strength between B and N in t | vedclass

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(D) In compound $(I)$,the lone pair of electrons on the $N$ atom is partially donated to the empty $d$-orbitals of $Si$ through $p\pi-d\pi$ back-bondi

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$II > I$

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(D) In compound $(I)$,the lone pair of electrons on the $N$ atom is partially donated to the empty $d$-orbitals of $Si$ through $p\pi-d\pi$ back-bonding.This decreases the electron density available for $p\pi-p\pi$ back-bonding with the empty $p$-orbital of $B$.In compound $(II)$,$C$ has no empty $d$-orbitals,so the lone pair on $N$ is fully available for $p\pi-p\pi$ back-bonding with $B$.Therefore,the $\pi$-bond strength is greater in $(II)$,i.e.,$II > I$.

List-$I$ (Molecule Species)	List-$II$ (Property/Shape)
$A$. $SO_2Cl_2$	$I$. Paramagnetic
$B$. $NO$	$II$. Diamagnetic
$C$. $NO_2^-$	$III$. Tetrahedral
$D$. $I_3^-$	$IV$. Linear

Compare $\pi$-bond strength between $B$ and $N$ in the following compounds: $(I)$ $((CH_3)_3Si)_2N^{-}BH_2$ and $(II)$ $((CH_3)_3C)_2N^{-}BH_2$.

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Match List-$I$ with List-$II$ :

List-$I$ (Molecule Species) List-$II$ (Property/Shape)

$A$. $SO_2Cl_2$ $I$. Paramagnetic

$B$. $NO$ $II$. Diamagnetic

$C$. $NO_2^-$ $III$. Tetrahedral

$D$. $I_3^-$ $IV$. Linear

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How many $S-S$ bonds are present in the cyclic trimer of sulfur trioxide,$(SO_3)_3$?

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